groups_remove_data_for_user( int $user_id )

function groups_remove_data_for_user( $user_id ) {
	BP_Groups_Member::delete_all_for_user( $user_id );

	/**
	 * Fires after the deletion of all data for a user.
	 *
	 * @since BuddyPress 1.1.0
	 *
	 * @param int $user_id ID of the user whose data is being deleted.
	 */
	do_action( 'groups_remove_data_for_user', $user_id );
}